MESON Chess Problem Database

Problem Display
PID: 140154 (bBRn4/nPP4Q/pPkP1N2/P2p4/8/1K6/8/8 w - - 0 1)

Molnar, Arpad

Tijdschrift vd KNSB, 1953

bBRn4/nPP4Q/pPkP1N2/P2p4/8/1K6/8/8

#2

10 + 6

102 Probleemblad 1975
56 The Problemist 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.cxd8S#
    • 1...Kxb7
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Sb5
      • 2.cxd8S#
  • Tries
    • 1.Qd7+?
      • 1...Kxb7
        • 2.cxd8Q#
        • 2.cxd8S#
        • 2.cxd8B#
        • 2.cxd8R#
      • 1...Kc5!
    • 1.bxa8Q+?
      • 1...Kb5
        • 2.Qxd5#
      • 1...Kc5
        • 2.Qxd5#
      • 1...Kxd6
        • 2.Qxd5#
        • 2.cxd8S#
      • 1...Sb7!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qxd5#
      • 1...Kb5
        • 2.Qxd5#
      • 1...Kc5
        • 2.Qxd5#
      • 1...Kxd6
        • 2.cxd8Q#
        • 2.cxd8B#
      • 1...Kxb7
        • 2.cxd8S#
      • 1...d4
        • 2.Qd5#
        • 2.cxd8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(c);P-FLIGHT,XP(D)::PXS(f)=S
    • K(c);S_FLIGHT,XP(F)::PXS(f)=Q
    • S(d);N_GUARD,SBLOCK::PXS(f)=S
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(F);CHECK,XB(e)
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR2(F),XP(a)
        • K(c);OGATE,P-FLIGHT::QAR1(F),XP(a)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H),XP(a)
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT::QAR2(H),XP(a)
      • K(c);P-FLIGHT,P_SPINP(a)::QAR1(H),XP(a)
      • K(c);P-FLIGHT,XP(D)::PXS(f)=Q
      • K(c);S_FLIGHT,XP(F)::PXS(f)=S
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